Lines a and b are parallel.

what is the measure of angle b?

enter your answer in the box.
b =
\degree

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Collin did the work to see if 10 is a solution to the equation r/4=2.4